Hi i just bought a 1977/78 Toyota Fourwind RV, and everything works inside the RV and the only problem i am having is the top running lights dont work. i have tested the bulbs and they all work. i try to just ground one of the lights and they dont work put jsut 12v from batt and that doesnt work but if i get a 12v battery and hook up + and - to bulb it comes on. HELP PLEASE or suggestions.
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